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Everyone who has an e-mail account has probably received a forwarded chain letter promising good luck if the message is forwarded on to others--or terrible misfortune if it isn't. The sheer volume of forwarded messages such as chain letters, online petitions, jokes and other materials leads to a simple question--how do these messages reach so many people so quickly? New research into these forwarded missives by Jon Kleinberg of Cornell University and David Liben-Nowell of ... More at http://www.nsf.gov/news/news_summ.jsp?cntn_id=111580&govDel=USNSF_51 This is an NSF News item.
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